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by imtringued 3754 days ago
Concurrent garbage collectors exist. It's nothing new or special. The problem is you need read barriers which means your garbage collector ends up slowing your entire programm significantly down. For some reason Intel and AMD decided it's not worth it to add hardware acceleration for read and write barriers so end up paying a lot of $ for custom designed processors from Azul if you truly need a concurrent garbage collector.

http://www.azulsystems.com/products/vega/processor